@kazuhisa.matsuda,

The API option for "Hybrid Instruments - Use EJV Fixed Income price source" is "UseDebtOverEquity" (yes I agree, it is not intuitive).

In more detail:

How to retrieve the full list of user preferences settings available in the API

GET https://hosted.datascopeapi.reuters.com/RestApi/v1/Users/UserPreferences(PutYourUserIdHere)

How to set user preferences using the API

Use a PUT command to the same URI as for the GET. For the body, use the "ContentSettings" and "UiSettings" objects received from the GET, setting values for your needs.

To make it easier for you to identify the options, below is the body of the PUT request with the full list of these preference settings, re-ordered to match the order of display in the user preferences screen (see also the screenshot):

{
    "ContentSettings": {
        "PreferredIdentifier": "RIC",

        "ImportOfExpiredInstrumentsAllowed": true,
        "ImportOfOpenAccessRicsAllowed": true,
        "AllowHistoricalInstruments": true,
        "AllowLimitedTermInstruments": true,
        "ImportOfUnsupportedInstrumentAllowed": false,
        "ImportOfDuplicateInstrumentsAllowed": false,
        "ImportOfDuplicateLegalEntitiesAllowed": false,
        "IgnoreFinr": false,
        "UseDseOverLipper": false,
        "DefaultToUsExchange": false,
        "UseConsolidatedQuoteSourceForUsa": false,
        "UseConsolidatedQuoteSourceForCanada": false,
        "UseDebtOverEquity": true,
        "UseOtcPqSource": false,
        "RequireOfferingCodeMatch": false,

        "RicMaintenanceReportsEnabled": true,
        "PartialEmbargoedReportsEnabled": true,
        "IntermediateReportsEnabled": true,
        "DeltaReportsEnabled": true,
        "ReturnNullCodeValuesInExtractionPricingFields": false,
        "ReturnLastTradingDayPriceOnNonTradingDays": false,
        "IncludeDelistedRicsForFileCodeExpansion": true,        
        "FiGlobalSnapshotPricesForPpxUs3Pm4PmEnabled": false,

        "AllowSubclassImport": false
    },
    "UiSettings": {
        "TimeZone": "W. Europe Standard Time",
        "LongDateFormatString": "MMMM dd, yyyy",
        "ShortDateFormatString": "ddMMyyyy",
        "LongTimeFormatString": "HH:mm:ss",
        "ShortTimeFormatString": "HH:mm",
        "DateSeparator": "-",
        "TimeSeparator": ":",
        "DecimalSeparator": ".",
        "GroupSeparator": ","
    }
}

PS: I'm not sure what the "AllowSubClassImport" one corresponds to, that is why it is isolated at the end.

Thank you very much for your response. so which one is the equivalent option to manage 'Hybrid Instruments - Use EJV Fixed Income price source' ?

Oops!, I missed it..... thank you very much for your support.